Does it have to be structural? Polystyrene beads are _cheap_ and pack nicely. Ditto packing peanuts. <br clear="all">--Matthew Goodman<br><br>=====================<br>Check Out My Website: <a href="http://craneium.net" target="_blank">http://craneium.net</a><br>
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<br><br><div class="gmail_quote">On Thu, May 31, 2012 at 12:12 PM, Chris Weiss <span dir="ltr"><<a href="mailto:cweiss@gmail.com" target="_blank">cweiss@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
might be out of your budget, but I've found the great stuff "pro"<br>
window and door cans to expand with far less force than the single use<br>
window and door stuff. There's also quite a lot more in the can, far<br>
more than just the difference in can size. Also with the gun, you can<br>
use a small amount and then let the gun sit with the can on it for up<br>
to a month and won't cure, great for prototyping iterations like you<br>
seem to be doing. Instead of 1 can per iteration, you might get 4-5<br>
iterations per can.<br>
<div class="HOEnZb"><div class="h5"><br>
On Thu, May 31, 2012 at 10:00 AM, Frantisek Apfelbeck<br>
<<a href="mailto:algoldor@yahoo.com">algoldor@yahoo.com</a>> wrote:<br>
> Hi to all,<br>
> I need to insulate around 5-10 cm space all around an inner polyethylen (PE)<br>
> box (5 mm thick, cube, a=500 mm) and between it's outer MDF board based<br>
> shell (12 mm thick, cube, a=600 mm). The device is going to be an<br>
> experimental incubator, so temperature insulation is crucial. I have tried<br>
> to use polyurethane foam but it is expanding therefore it would distort the<br>
> soft PE internal layer. I used partly a polystyrene board for the back but<br>
> the boards do not fit exactly (thickness) and due to the fact that I used<br>
> screws and brackets in the project a lot it would be hard to put the boards<br>
> in anyway.<br>
><br>
> The best thing in this moment would be to fill the spaces between the boxes<br>
> with some liquid un-expanding insulation which would get in all the spots,<br>
> become firm and I would be fine. The plan is that I would insert the inner<br>
> PE box, fasten it, flip the whole box on it's back side and fill the gap<br>
> between PE box and MDF box up with the insulation and "happy ever after".<br>
> Alternatively would you know if it would be feasible to brake down the<br>
> polystyren boards on a small pieces and mix them with some glue and apply it<br>
> in a similar manner? My budget for the insulation is $20-40 and I'm now in<br>
> Seoul South Korea.<br>
><br>
> Thanks a lot for any help! It is a prototype so a great learning experience<br>
> but I have spend more than 20 hours on building two smaller size simple<br>
> boxes - bit slow I would say.<br>
><br>
> Sincerely,<br>
><br>
> Frantisek Algoldor Apfelbeck<br>
><br>
> biotechnologist&kvasir and hacker<br>
><br>
><br>
> <a href="http://www.frantisekapfelbeck.org" target="_blank">http://www.frantisekapfelbeck.org</a><br>
><br>
><br>
> "There is no way to peace, peace is the way." Ghandi<br>
><br>
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